IP communicator with VPN

I have router DSL 877 and uc520 connecting to each other, and I have PC outside installed on it Cisco VPN client and Cisco ip communicator, I want to make IP communicator working with uc520, the problem is I have already configure the VPN on router and it is working, but I can not ping the uc520,

I have attached the Visio layout how is the connection, and the configuration.

Replies

As per your topology, your voice subnet (10.1.1.0/24) is currently the same as your VPN IP pool subnet (10.1.1.x) . You would need to change the VPN IP Pool subnet to a unique subnet so routing will work.

Further to that, you would also need to change the following ACL 1 assigned to your NAT: